A small blacksmith anvil can be as long as a few inches and serves as an ideal work surface for tinsmithing, working with brass, and creating jewelry pieces. Collectors, too, might have an interest in a vintage blacksmith anvil to use as a display in a shop or even as a working tool. Any and all options are available through the wide range of blacksmith anvil inventories on eBay so you can be sure to find a classic piece of forging history for your workshop.
In 1604 there was a supernova that is commonly called Kepler's Supernova. That is the last one that was definitely observed (there may have been others since then that were obscured by dust in our own galaxy). The telescope was first used by Galileo in 1609 to observe the heavens (he didn't invent the telescope, however) and we haven't observed a supernova in our galaxy since before then!
Supernovae Leave Behind Neutron Stars or Black Holes Main sequence stars over eight solar masses are destined to die in a titanic explosion called a supernova. A supernova is not merely a bigger nova. In a nova, only the star's surface explodes. In a supernova, the star's core collapses and then explodes. In massive stars, a complex series of nuclear reactions leads to the production of iron in the core.